Heat-insulating unit.



G. H. ELLIS.

HEAT INSULATING UNIT. APPLICATION FYILED SEPT-211M915.

Patented Aug. 14, 1917.

2 SHEETSSHEET I.

earye A E/fla a) 075 arromvirs gfm G. H. ELLIS.

HIEAT INSULATING UNIT.

APPLICATION man sEPT.'24. I915.

1,236,694, r Patented Aug. 14, 1917.

2 SHEETSSHEET 2.

GEORGE E. ELLIS, OF ST. PAUL, MINNESOTA.

HEAT-INSULATING UNIT.

Specification of Letters Patent.

Patented Aug. 14L, 11917.

Application filed September 24, 1915. Serial N 0. 52,433.

To all whom it may concern:

Be it known that I, GEORGE H. ELLIS, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota,' have invented certain new and useful Improvements in Heat Insulating Units; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

y present invention has for its object to provide an improved heat insulating unit adapted for very general use, but particularly adapted for use in connection with cars, and the like, and to such ends, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

Particularly, the present invention is designed as an improvement on the heat insulating unit disclosed and claimed in my Patent 1,137,197, of date, April 27, 1915, entitled Refrigerator car floor, and in my co-pending application S. N. 16,061, filed March 22, 1915, and entitled Heat insulating unit. 1

The present invention is more especially directed to the improvement of the form of flexible water proof envelop which surrounds a heat insulating filler.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Figure 1 is a fragmentary sectional View in perspective illustrating the improved heat insulating in the manner disclosed and claimed in my prior patent above. identified;

ig. 2 is a perspective view of one of the heat insulating units;

Fig. 3 is a bottom plan view of one of the heat insulating units with some parts broken away; and

Fig. 4 is a fragmentary section on the line a m of Fig. 2.

Of the parts of the car, the numeral 1 indicates one of the side walls, the numeral 2 one of the side sills, the numeral 3 one of the intermediate sills, the numeral 4 the car floor proper, and the numeral 5 the boards which constitute a sort of a subfloor and .proof, even if unit applied to a car floor 'tion, the water is prevented from are supported from the sills by cleats 6. The heat insulating units are closely placed together upon the subfloor 5 between the sills and, as shown, have their edges overlalpped by strips 7 secured to the adjacent s1 s.

This flexible water proof envelop is indicated by the numeral 8, and the fiber filler 1s indicated as an entirety by. the numeral 9. As shown, the filler is made up of felted fibrous heat insulating sheets and interposed strips. The flexible water proof sheet from which the envelop is formed is bent around the filler so that it same,- and to form the envelop, its edges are overlapped in the one direction, and the projecting ends of the envelop are then folded and overlapped at 8*, much after the manner of folding paper around a cubical parcel. Attention is here called to Fig. 2, reference to which it will be noted that is turned downward over the same, in suc manner that there is no joint to leak close to the bottom of the envelop even where cement is not employed on the overlapped end portions. However, all of the overlapped edge and end portions of the envelop are advisably securely cemented together by the use of a suitable water proof cement, so that the envelop is thereby made water completely submerged in the envelops will not, unconditions be completely submerged in water. 'In the applicationillustrated, the water which leaks through the boards and floor will run downward bewater. -However, der any ordinary tween the edges of the units and the adjacent sills, and from thence, between the joints of the subfloor boards 5.

As a special feature of the present invenpassing directly between the abutting ends insulating such joints is also prevented, by means of flexible lap strips 10. These lap strips 10 are also preferably of water proof material. Here it may be statedthat the envelop and lap strips are advisably made from a light weight commercial asphalt roofing which is not only water proof, but is, in itself, a good heat insulating material. The said lap strips 10 are cemented to the envelop at one edge and theyare preferably applied, one to completely incloses the of the units, and air circulation between gether, between the units will the top and the other to the bottom of the envelop, and in such manner that one projects from the top of one end and the other from the bottom of the other end of said envelop. When the envelops are put toas shown in Fig. 1, the end joints e lapped and projected, both at top and bottom, and thus the efficiency of the heat insulating filler or surface is increased.

What I claim is:

1. A heat insulating unit comprising an envelop and a heat insulating filler, the latter having secured thereto, a lap strip that projects from one face thereof and is adapted to overlap with an adjacent similar heat insulating unit.

2. A heat insulating unit comprising a flexible water proof envelo and a heat insulating filler, the said enve op havin a flexible water proof lap strip attache to one face thereof and projecting beyond the end thereof and adapted to overlap the abutting its lower sheet turned upward and the ends of its upper sheet turned downward, and folded over the said upturned edges.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE H. ELLIS.

Witnesses:

F. D. MERCHANT, BERNICE, G. 

